chore: import upstream snapshot with attribution

functions/function_calling/weather.py

@@ -0,0 +1,34 @@
+def get_city_num(city: str) -> dict:
+    """
+    Fetch the city code for a given city name.
+    Example response:
+    {
+        "city": "Beijing",
+        "city_num": "1010",
+    }
+    """
+    return {
+        "city_num": 3701
+    }
+
+def get_weather(city_num: int, unit: str = "celsius") -> dict:
+    """
+    Fetch weather information for the city represented by ``city_num``.
+    Example response:
+    {
+        "city_num": "1010",
+        "temperature": 20,
+        "unit": "celsius"
+    }
+    """
+    temperature_c = 15  # Hardcode the temperature value
+    if unit == "fahrenheit":
+        temperature = temperature_c * 9 / 5 + 32
+    else:
+        temperature = temperature_c
+
+    return {
+        "city_num": city_num,
+        "temperature": temperature,
+        "unit": unit
+    }